Vibration dampener



K. R. MANVILLE VIBRATION DAMPENER Sept. 6, 1927. l 1,641,230

Filed May 5, 1926 Mw, M MJ/M.

Patented Sept. 6, 1 927.

UNITED sTATEs 1,641,230 PATENT oFFlcE.

KEITH R. MANVILLE, OF NEW YORK, N. Y., ASSIGNOB, T0 INTERNATIONAL MOTOR COMPANY, OF NEW YORK, N. Y.,

VIBRATION Application led Hay 5,

The present invention deals with the problems outlined in the patent to Alfred F. Masury, No. 1,627,917, dated May 10, 1927 andA assigned to the assignee of this patent. As noted therein, the torsional vibration produced in a crank shaft at its critical speed, which speed is determined by the inherent characteristics of the crank shaft, Such as number of cranks, weight, etc. becomes very injurious atthe above point and it is highly desirable to prevent the same.

I-Ieretofore, a body mounted with the {iy wheel of the shaft has been provided and connected thereto through a friction clutch or restricted Huid path so that any sudden change in speed produced by the above vibrations must first overcome, the resistance oiered through such condition. In th1s manner, a structure having one characteristic curve is combined with one having a widely different curve and there results a smoothing out of the performance c urve at the critical point .or points in question.

The present invention seeks to approachv the problem from a different angle land accomplishes a more effective elimination of these points by providing a fly Wheel capable of relative rotative motion with respect to and connected to the rotating body by a variable inertia device.

Reference will-now be had to the accompanying drawings forming a part hereof for a more detailed description of the device, wherein Figure 1 isd la'I front elevation, partly in section, showin'g a preferred form of my dev1ce.

Figure 9. is fra' side section taken on the line 2 2 of Figure 1 and looking in the direction of the arrows.

In the drawings, a represents a crank shaft provided with a suitable shouldeia and collar a2 against which the device may be seated. Upon shaft a is mounted spider Z),

the same being splined thereto as at b.-

Port-ions b2 project in a direction parallel to the axis of a and to the spider at'such points are pivoted arms c, secured by pins c to the spider.

At their other ends, the arms have inertia elements c2 formed thereon and the arms are -offset as at 03 so that the inertia portions` are not blocked in their outward movement by the relatively movable fly-,wheel to be later described. These arms, when at rest,

A CORPORATION OF DELAWARE.

DAMIPENERh 1926. Serial No. 106,807.

lie on the pivot portions of the spider, be ing held lightly thereon by means of rubber blocks cl, the pressure on said blocks being eqlualized by means of a circumposed fly i' W ieel e capable -of relative rotative motion with respect tothe body. The wheel and the arms have co-operating seats e and c*y respectively, which receive the rubber blocks so that a connection of great strength is provided.

In mounting the apparatus the blocks are positioned in the seats under' compression whereby their resiliency, strength and wearing qualities are increased.

When the shaft a is rotated, the weights c2 move outwardly against the resistance of the rubber. Sudden changes in speed must overcome thechanges of inertia due to the above and in this manner, deleterious vibrations are damped out. Furthermore, the fly wheel smooths out the vibrations previously noted and the result is a highly effective damping device.

Changes in theabove structure can be made which fall reasonably within the needs of different installations and the invention is not to be limited except by the appended claims.

What I claim is: l 1. A vibration damping device, comprising a rotating member, anelement capable of rotative movement with respect tothe member, and variable inertia means mounting the former on the latter.

2. A vibration damping device comprising a rotating member havin a given vibration characteristic, a mem r carried thereby having a different characteristic and means for mounting the latter on the former said means including means for vary-v ing the vibration characteristic thereof automatically.

` 3. A vibration damping device comprisl thereby, variable inertia, elements pivoted L thereto, a member capable of rotative movement with respect to the first member, and means connecting the seme to the variable elements` whereby said member is mounted upon the rotating memberl 5. A vibration dampimgr device comprising a rotating member, a spider carried thereby, variable inertia elements pivoted thereto, a fiy Wheel capable of rotative movement with respect to the first member and yielding non-metallic means mounting the same on the inertia elements whereby the fly wheel is mounted on the rotating member.

6. A vibration damping device comprisremanso ing a rotating member', a spider carried thereby, a plurality of variable inertia means pivoted on the latter, seats on the inertia means, a Hy wheel capable of rotative move ment with respect to the rst member, seats thereon (ro-operating with theiirst named seats, and nonmetallie yielding means disposed between the seats under compression, said inertia means resting on a pivot point of an adjacent means when the rotating member is at rest. Y

This specification signed this 27th day of Api-i1 A. D. 1926. f

Knrrn n. MANVILLE. 

